This synopsis covers evidence for the effects of conservation interventions for native farmland wildlife. It is restricted to evidence captured on the website www.conservationevidence.com. It includes papers published in the journal Conservation Evidence, evidence summarized on our database and systematic reviews collated by the Collaboration for Environmental Evidence. It is the thrid volume in the series Synopses of Conservation Evidence. Evidence was collected from all European countries west of Russia, but not those south of France, Switzerland, Austria, Hungary and Romania. A list of interventions to conserve wildlife on farmland was developed collaboratively by a team of thirteen experts. A number of interventions that are not currently agri-environment options were added during this process, such as ‘Provide nest boxes for bees (solitary or bumblebees)’ and ‘Implement food labelling schemes relating to biodiversity-friendly farming’. Interventions relating to the creation or management of habitats not considered commercial farmland (such as lowland heath, salt marsh and farm woodland) were removed. The list of interventions was organized into categories based on the International Union for the Conservation of Nature (IUCN) classifications of direct threats and conservation actions. Interventions that fall under the threat category ‘Agriculture’ are grouped by farming system, with separate sections for interventions that apply to arable or livestock farms, or across all farming types.

To feed its 1.2 billion people, China may soon have to import so much grain that this action could trigger unprecedented rises in world food prices. In Who Will Feed China: Wake-up Call for a Small Planet, Lester Brown shows that even as water becomes more scarce in a land where 80 percent of the grain crop is irrigated, as per-acre yield gains are erased by the loss of cropland to industrialization, and as food production stagnates, China still increases its population by the equivalent of a new Beijing each year. When Japan, a nation of just 125 million, began to import food, world grain markets rejoiced. But when China, a market ten times bigger, starts importing, there may not be enough grain in the world to meet that need - and food prices will rise steeply for everyone. Analysts foresaw that the recent four-year doubling of income for China's 1.2 billion consumers would increase food demand, especially for meat, eggs, and beer. But these analysts assumed that food production would rise to meet those demands. Brown shows that cropland losses are heavy in countries that are densely populated before industrialization, and that these countries quickly become net grain importers. We can see that process now in newspaper accounts from China as the government struggles with this problem.

As land is lost to urban sprawl and other non-farm activity, our ability to produce food is diminished and options for future food production are limited. Farmland preservation speaks to the need to preserve the agricultural land base for future generations. The need for protection is driven by uncertainty caused by climate change, population growth, food security, energy availability, and other local and global factors. This uncertainty means that there is an ever-growing responsibility to ensure that the actions of today do not compromise the needs of future generations. This second edition of Farmland Preservation provides a range of views and case studies from across Canada, the United States, and beyond. Its fourteen essays are intended to help the reader understand the importance of the issue and the potential for applying new approaches to agricultural protection, policy tools, and initiatives.